username = input('请输入姓名：')
password = input('请输入密码：')
code = input('请输入验证码：')
if code == '8888':
    print('验证码正确')
    if username == 'admin' and password == '123456':
        print('登录成功')
    else:
        print('用户名或密码错误')
else:
    print('验证码错误')
